Hydraulics and Fluid Mechanics in ME
Venturimeter is used to

Measure the discharge of liquid flowing in a pipe
Measure the velocity of a flowing liquid
Measure the pressure difference of liquid flowing between two points in a pipe line
Measure the pressure of a flowing liquid

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Hydraulics and Fluid Mechanics in ME
Coefficient of contraction is the ratio of

Actual velocity of jet at vena contracta to the theoretical velocity
Loss of head in the orifice to the head of water available at the exit of the orifice
Loss of head in the orifice to the head of water available at the exit of the orifice
Area of jet at vena-contracta to the area of orifice

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